diff --git a/Luogu/problem/B2012/B2012.cpp b/Luogu/problem/B2012/B2012.cpp
new file mode 100644
index 00000000..b86e9fcb
--- /dev/null
+++ b/Luogu/problem/B2012/B2012.cpp
@@ -0,0 +1,10 @@
+#include <bits/stdc++.h>
+
+using namespace std;
+
+int main() {
+    double a, b;
+    cin >> a >> b;
+    cout << fixed << setprecision(3) << b / a * 100 << '%' << endl;
+    return 0;
+}